Final answer:
The most effective method to share a knowledge article with another user is via a permalink, which provides a direct and permanent link to the specific content.
Step-by-step explanation:
The best way to share a knowledge article with another user is to use a permalink. A permalink is a permanent static hyperlink to a specific web page, ensuring that even if the content is updated, the link will still direct users to the information they are looking for. Keywords might be less effective since they would require the other user to search for the article themselves, possibly leading to multiple results or difficulty in finding the specific article intended. A screenshot could miss contextual information and interactive elements, and copying and pasting may lead to formatting issues or be less efficient.